@Ponypoor
My 'range' of egg colors. The 3 at the top are my duck eggs, 1 from my Rouen mix, the other 2 from my Khaki Cambells. Note the greyish 'cast' on theirs. Also, circled in red, is where the wet bloom came in contact with the straw and wipes off the slight color. Once I wash them, this stays, so it really makes them look more 'dirty' than colored, as once the bloom drys, the color stays intact.
The spotted brown egg with a blue arrow but no words is from my Welsummer. I used to have a true blue eggs, but now I only have slight variations of blue-green, and quite the range of brown eggs. I don't think it shows true in the picture, but one of the brown eggs has a real pinkish-lavender 'cast' to it. That, is from one of my Buff Orpington girls. They tend to lay pink/lavender eggs. However, not usually this dark...I only have one laying that dark of an egg color.
View attachment 2978737
@BY Bob I really give you credit!

(Gold star for you!) It is so hard to write with your finger on the mouse pad. Yours come out quite legible! Not sure how you do it!